Test a zero-capacity CircularBuffer as part of the randomized test suite

Author: andreacorbellini

tests/randomized.rs

@@ -272,6 +272,11 @@ fn test<const N: usize, T>()
     }
 }
 
+#[test]
+fn zero() {
+    test::<0, u64>();
+}
+
 #[test]
 fn small() {
     test::<10, u64>();